*{
    /* 初始化 */
    margin: 0;
    padding: 0;
}
.jieshao{
    /* 100%窗口高度 */
    height: 100vh;
    /* 弹性布局 */
    display: flex;
    /* 弹性布局 水平+垂直居中 */
    justify-content: center;
    align-items: center;
    /* 渐变背景 */
    background: white;

}
body .card:nth-child(1){
    position: relative;
    top: -100px;
    left: 220px;
}
body .card:nth-child(2){
    position: relative;
    top: -100px;
    left: 260px;
}
body .card:nth-child(3){
    position: relative;
    top: -100px;
    left: 290px;
}
body .card:nth-child(4){
    position: relative;
    top: 300px;
    left: -100px;
}
body .card:nth-child(5){
    position: relative;
    top: 300px;;
    left: -620px;
}
.card{
    /* 相对定位 */
    position: relative;
    width: 2500px;
    height: 400px;
    margin: 20px;
    background-color: #758a99;
    border-radius: 20px;
    /* 溢出隐藏 */
    overflow: hidden;
    /* 弹性布局 */
    display: flex;
    /* 元素纵向排列 */
    flex-direction: column;
    /* 居中 */
    align-items: center;
    color: #fff;
    /* 阴影 */
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
    /* 不让其被挤压 */
    flex-shrink: 0;
}

.card .photo img{
    width: 100%;
    height: 100%;
    /* 保持原有尺寸比例，裁切长边 */
    object-fit: cover;
}
/* 默认大图 */
.card .photo{
    /* 绝对定位 */
     position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    border-radius: 0%;
    overflow: hidden; 
    /* 动画过渡 */
    transition: 0.5s;
}
/* 鼠标移入变小图 */
.card:hover .photo{
    top: 30px;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(0, 0, 0,0.8);
}
/* 这里加个黑色到透明的渐变背景，可以更好的看清楚名字 */
.card .photo::before{
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom,transparent 50%,#333);
}
.card h1{
    position: absolute;
    top: 350px;
    transition: 0.5s;
    font-size: 22px;
}
.card:hover h1{
    top: 160px;
    font-size: 18px;
}
.card h2{
    margin-top: 210px;
    width: 80%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    font-size: 14px;
    text-align: center;
    margin-bottom: 5px;
    padding-bottom: 5px;
    font-size: 16px;
}
.card p{
    width: 90%;
    text-indent: 32px;
    font-size: 12px;
    margin-bottom: 15px;
    line-height: 20px;
}
.card a{
    font-size: 10px;
    color: rgba rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 8px 30px;
    border-radius: 8px;
}
.card a:hover{
    color: #fff;
    background-color: rgba(255, 255, 255, 0.2);
}